Baby Lock Lauren (BL450A) Instruction and Reference Guide - Manual (Page 19)

17
thread tension
When you are doing two thread
serging for the first time use a
medium weight fabric to sew a test
sample for determining the correct
tension setting. Begin by adjusting
the needle tension to “1” and the
lower looper tension to “4”. Sew a
sample. If the threads are not
balanced make necessary
adjustments according to the
illustrations.
Increase Needle Thread Tension
and/or Decrease Lower Looper
Thread Tension.
Needle thread laps around over the
top of fabric. Lower looper thread laps around
over the bottom of fabric.
Increase Lower Looper Thread
Tension and/or Decrease Needle
Thread Tension.
to convert from 2-thread to 3- or 4- thread sewing
1. Open the front cover and bring the upper looper to its lowest
position.
2. With your finger, push back on the subsidiary looper, and rotate
clockwise (up) to disengage from the eye of the upper looper.
3. Remove subsidiary looper from the upper looper shaft and place in
accessory box.
4. Remove the lower looper thread from the thread guide (B) and
hook to the thread guide (A).
5. Re-thread upper looper thread guides which may have been
unthreaded and back through the eye of the upper looper.
6. For four thread sewing, replace the second needle and its corre-
sponding thread.
7. Rebalance tensions - tighten needle thread, re-adjust lower looper
if necessary.
FREE ARM SEWING
This machine will convert to free arm sewing by simply opening the Extension Table. It is used for sewing
sleeves, trousers or similar places that are difficult to sew on a flat bed machine.
Turn lever located on left side of extension table to the
front of machine and swing table out.
(A) (B)